Here's a contemporary Tex Mex Polka which is VERY different Italian and German polkas on the Audya. Notice the bass drum does not play quarter notes throughout. The TX Mex polka bass drum is more sparse and sometimes syncopated. Also the fills in Tejano music are more aggressive than the European polkas. Sort of a rock drummers interpretation of polka.

http://www.youtube.com/watch?v=5zWrBbit35c